Eleanor Roosevelt thanks a chemical engineering firm in Philadelphia for manufacturing water for the king and queen of England on their visit to America.
This video highlights a collection of letters from Eleanor Roosevelt to a chemical engineering firm in Philadelphia—thanking them for manufacturing water for a visit from the king and queen of England.
Adventure and tangled interests under the sea.
An inconspicuous technology sparks revolution on the subcontinent.
How the scientific prowess of King Mongkut of Siam helped stave off European incursion.
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